Question

write the format of invertendo

Answer 1

Answer:

Invertendo Property: For four numbers a, b, c, d if a : b = c : d, then b : a = d : c; that is, if two ratios are equal, then their inverse ratios are also equal.

If a : b :: c : d then b : a :: d : c.

Proof:

a : b :: c : d

⟹

a

b

=

c

d

⟹

b

a

=

d

c

⟹ b : a :: d : c